Beijing Tengcon Technology Co.,Ltd, as the predecessor of Beijing Econtrolnet Co.,Ltd, was established in 2002. Tengcon Technology has 3 subsidiaries, which are Econtrolnet, Tengcon Zhi Yi Technology and Tengcon Automation Engineering Co., Ltd.In 2016, we established HK office (HK TENGCON GROUP LIMITED). Our products are widely used in the West-to-East Natural Gas Transmission Project, the Olympic works, the Tang Jiashan dammed lake Project. With nearly 10000 sets of production per year, We are widely accepted by our users and partners.